Scraper



G. W. PACKER SCRAPER Filed Nov. 2, 1922 x i i T E i STATES PATENT OFFICE;

GLENN W. PAGKER, OFOHICAGO, ILLINOIS, ASSIGN'OR TO GOODMAN MANUFACTUR- ING- COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SORAIPER.

Application filed November Z, 1922. Serial No. 598,480.

To all whom it may com/cm:

Be it known that I, GLENN W. Paomm, a citizen of the United States, residin at Chicago, in the county of Cook and tate of Illinois, have invented certain Improvements in Scrapers, of which the following is a specification. 1

This invention relates to an improvement in scrapers, and more particularly to the type of reciprocable scrapers disclosed in my prior application, bearing Serial Number 470,771, filed May 19,1921, in which the scraper is provided with a pair of lateral opening hinged wall portions at its rear end, said wall portions being operatively connected with a head rope and a tail rope so that they may be opened when the scraper is pulled rearwardly into a pile of loose material, and closed when the scaper is pulled in the opposite direction, so as to inclose a load of material in the scraper. In the construction of a scraper above described, the head and tail ropes have divided terminals, each side of which are operatively connected with only one of the hinged portions. Under certain operating conditions, however, it is found desirable to exert a pull on one of the ropes, as for instance, the head rope, at an angle to the normal longitudinal axis of the scraper, and when this is done, one of the c hinged portions has a tendency to open, owing to the unequal tension on the two terminals of the head rope.

The principal object of the present invention is to provide an improvement in the construction of actuating mechanism for the hinged wall portions of 'a scraper of the open end type, above described, whereby a pull may be exerted on the head and tall 40 ropes atvarious angles w1th respect to the longitudinal axis of the scraper, WhlOh pull is operative to actuate both hinged portions under substantially equal tenslons.

My invention may be understood by refi ferring to the accompanying drawings, in which Figure 1 is a plan view of the scraper, embodying one form of my IIIVGIltlOD, Flgure 2 is a view in vertical cross sectlon of scraper shown-in Figure 1. Figure 3 is an enlarged sectional view taken on line 3, 3'

connected with any suitable power device, such as a hoisting engine.

The scraper comprises a body portlon 12, having side walls 13, 13, connected by front and rear cross members 14 and 15, respec tively. The drawings illustrate a preferred form of scraper having no bottom, but a bottom may be found desirable under some circumstances, and may be provided without departing from the scope of my Invention; The bottom margins of the Walls 13, 13 are inclined to turn inwardly to form substantially horizontal cutting edges, 16, 16. The rear end of the scraper comprises two upright wall portions or doors 17, 17,pivota 1y connected to the rear end of the side walls, as indicated at 18. The arrangement is such that the doors normally form a closure for the rear end of the scraper, but are mounted to swing laterally and rearwardly into a position substantially in alignment with the adjacent side walls of the scraper. The bottom margins of the doors 17 17 are preferably inclined or turned inwardly to form cutting edges 19, 19 similar to the cutting edges 16, 16 of the side walls.

Means coacting with the draft ropes are provided for actuating the rear wall portions, so as to open the rear end of the scraper when it is being moved rearwardly and close the rear end while it is being moved forwardly. This is accomplished by operatively connecting both the head rope 10 and the tail rope 11 to the doors 17 17 so as to tend to move them in opposite directions, depending upon the relative tension on the two draft devices. In the embodiment illustrated, head rope 10 is connected at the forward end of the scraper to a flexible forwardedge of a wall portion 13. From thence the flexible member passes rearwardabout a guide or sheave 24, mounted on 1 the adjacent door 17 and thence forwardly again about a sheave mounted centrally 0 17, 17 are fully closed, and are limited also in its rearmostposition by suitable means, such as stops 51, 51, formed by the upright portions of the cross member 15, which extend downwardly into a position across the guiding members 41, 41, as shown in F igures 2 and 3. In the rearmost position 0 the cross bar 36 the doors 17, 17 are in their fully open position as shown in dotted lines in Figure 1.

From the above it will be seen that a scraper constructed as described may he rea cross brace 26 which extends between ciprocably operated so that the rear doors and connects the wall portions 13, 13. From thence the flexible member extends rearwardly about a second member 24 on the other door 17, and forwardly about a guide 23 mounted similarl to the guide already described as being a jacent the front end of the opposite wall. It will thus be seen that the flexible member 20 runs freely about the various sheaves with which it is engaged, so that the head rope 10 may be pulled at various angles with respect to the longitudinal axis of the scraper, but at all angles exerts a substantially uniform tension on both sheaves .24, 24 mounted on the doors, as described.

Referring noW to the tail rope connections, it will be seen that said rope extends between the ends of the doors 17 17 and is provided at its end with a sheave or guide 30, mounted in a block 31. A flexible member 32 is turned rearwardly about the sheave 30 and from thence forwardly toward each side about sheaves 35, 35, and from thence rearwardly to clamps 34, 34, mounted on opposite sides of the scraper. Each of the sheaves 35, 35 are mounted on a movable cross bar 36. In the figures, this cross bar is located immediately under the cross brace 26, as shown in Fi ure 1. It is mounted to slide transversely hetween the guide members 41, 41, mounted on opposite walls of the scraper. The movable bar 36 is con-- nected with each of the doors 17, 17, by means of a air of links 45, 45 which are each pivotal y connected at 47 to a forwardly projecting member 48, mounted on its respective door. The forward end of each link, 45, is pivotally connected to the movable bar 36 by suitable means such as for this purpose.

a pin 44. In the construction shown the front ends of the link 45, 45 extend underneath the sheaves 35 and their terminal ends 46, 46 are turned upwardly to retain the flexible member 32 on the sheaves.

By means of the connecting links 45, 45, the doors 17 17 are swung outwardly when the movable crossbar 36 is moved rearwardly by operation of the tail rope 11, which acts through the flexible member 32 The movement of the cross bar 36 is limited in its forward position by stops 50, 50, in which position the doors into substantially parallel relation with each other, and offer a minimum resistance as the scraper cuts into the material to be gathered. The tension on the tail rope is exerted in substantially equal proportions to both doors, owing to the arrangement of the flexible member 32, even though the draft on the tail rope is not directly on the lon 'tudinal axis of the scraper, and the doors 1 17 will be operated simultaneously owing to their common connection with the movable cross bar 36. When the scraper has advanced sufficiently to gather, a load, the pull on the tail rope is discontinued and tension is placed on the head rope 10. Owin to the continuous arrangement of the flexi le member 20, the head rope may also be pulled at various angles with respect to the scraper, and a substantial equal tension on both hinged members 17, 17 will be exerted to close the same. Said hinged members will be closed simultaneously as in the case of the operation of the tail rope, owing to their common connection to the movable cross bar 36.

Although I have shown and described one form in which my invention may be embodied, it will be understood that many other means may be employed for accomplishing the same results, without departing from the spirit and scope of my invention. I do not, therefore wish to be understood as limiting myself to the specific construction illustrated herein excepting as specifically limited in the appended claims.

I claim as my invention:

1. A scraper having side walls, two end portions each pivotally connected with one of said walls to swing laterally, guide devices on said end portions, and draft means for reciprocably moving said scraper including a continuous draft member trained about both of said guide devices and co operating with other guide devices on said scraper to afford substantially equal tensions to both of said end portions tending to actuate the same.

2. A scraper havin side walls, two end portions each pivotal y connected with one of said walls to swing laterally, guide devices on said end portions, draft means for reciprocably moving said scraper including a continuous draft member trained about both of said guide devices and cooperating with other guide devices on said scraper to afford substantially equal tensions to both of said end portions tending to actuate the same, and means operatively connecting said end portion to positively actuate them simultaneously.

3. A scraper having side walls two end 10 portions each pivot-ally connected with one of said walls to swing laterally, draft means for reciprocably moving said scraper, means coacting with said draft means for actuating said end portions, and means operatively connecting said end portions together to actuate them simultaneously.

Signed at Chicago, in the county of Cook and State of Illinois, this 30th day of October, 1922.

GLENN W. PACKER. 

